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Патент USA US3080086

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March 5, 1963
K. w. RANDALL.
3,080,076
LOADING MACHINE
Filed 001;. 21, 1959
5 Sheefs-Sheet 1
INVENTOR.
KENNETH 'W. RANDALL
BY
ATTORNE'Y
March 5, 1963
K. w. RANDALL
3,080,076
1.0mm MACHINE
Filed 001.. 21, 1959
5 Sheets-Sheet 2
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INVENTOR.
KENNETH W. RANDALL
M7
ATTORNEY
March 5, 1963
K. w. RANDALL
3,080,076
LOADING MACHINE
Filed Oct. 21, 1959
5 Sheets-Sheet 3
~--—-———\_____1
INVENTOR.
KE/NNETH W. RANDALL
BY"
ATTORNEY
March 5, 1963
K. w. RANDALL
3,080,076
LOADING MACHINE
Filed Oct. 21, 1959
5 Sheets~$heet 4
K E N N E T H W.
BY
mavmEDNAml.LR.
ATTORNEY
March 5, 1963
K. w. RANDALL
3,080,076
LOADING MACHINE
Filed 001;. 21, 1959
5 Sheets-Sheet 5
R 22 .
38
4?
48
39
INVENTOR.
KENNETH W. RANDALL
BY
awn/12m.
ATTORNEY
United States Patent ‘O?ice
3, 8%;075
Fatented Mar. 5, 1963
2
The illustrated embodiment of the invention comprises
3,636,?)76
LQAB‘ZNG l'i/IAQEENE
Kenneth W. Elan-Tali, Pomona, (Ialifl, assignor to insley
Manufacturing Corporation, Endianapolis, End, a cor
peration of Indiana
Filed Get. 21, 1959, Ser. No. 847,724
4 illairns. (Ql. 214-433)
a cab 19 which is mounted on a revolving platform 11
carried by the usual crawler units 12, although manifestly
instead of crawler units, rubber-tired wheels may be em
ploye'. it will be understood that contained within the
cab it? is the usual engine (not shown) for imparting
motive power to various drive mechanisms including a hy
draulic pump. Since the particular construction and ar
This invention relates to loading machines, but more
ransement of these mechanisms form no part of the
particularly to machines having a bucket at the front 10 present invention, detail illustration and description
which is advanced or crowded relative to the ma.eria1
thereof are not regarded as being necessary.
and thereafter, after being ?lled, the bucket is elevated
On the forward end of the cab 10 are two pairs of
and swung to the desired place for dumping, such for ex
brackets 13 arranged at opposite sides thereof and con
ample as into a truck.
An object is to produce a new and improved front
nected to each pair is one end of a toggle arm 14 which
extends forwardly of the cab.
The pair-s of laterally
end loader which ‘embodies toggle mechanism for estab
lishing an exceedingly powerful crowding action and is
spaced arms 14 are connected together for purposes of
strength and rigidity by one or more cross braces Eda.
so constructed and arranged that the bucket remains
Pivotally connected on a cross shaft 16 to the front end
in -a predetermined position relative to the ground sur
of each toggle arm 14 are the rear ends of forward toggle
face, thereby to effect a smooth and uniform ‘grade at al 20 arms '15. As shown in FIGURE 5, the pair of toggle arms
most any selected angle.
15 are connected by a series of cross and diagonal
Another object is to produce a front end loader in
strengthening braces 15a.
which the bucket is carried at the outer ends of toggle
Depending from and secured to each of the rearward
‘arms which are hydraulically actuated to and from crowd
toggle arms 14 adjacent the rear end thereof is a rigid
ed position by hydraulic piston and cylinder assemblies 25 bracket Y] to which is pivotally connected the rear end
in an unique manner by which hydraulic power concomi
of a hydraulic cylinder 18 in which reciprocates a piston
tantly striai- htens the toggle arms ‘and depresses the toggle
rod 19, the front end of which is pivotally connected to
joint.
the respective forward toggle arm 15 at a point Ztl located
A further object is to produce a loader machine in
near the rear end thereof or at a point about one-third
which the bucket is carried by a toggle arm arrangement 30 of the length thereof measured from the rear end of same.
which itself forms part of a modi?ed and variable paral
The cylinder and piston arrangement 1349 is double
lelogram, the arrangement being such that crowding ac
tion is effected by straightening out the toggle and due to
the parallelogram, the bucket is maintained ‘at the desired
pitch during working operation.
A still further object is to produce a front end loader
in which the bucket is carried by a boom made up of
toggle arms which are power actuated to advance or re
tract the bucket, cable means being associated with the
[acting and hoses 18a and 18b lead to opposite ends thereof
from a suitable hydraulic pump in the cab 10, thereby
to enable liquid under pressure to be introduced selectively
at one end or the other for driving the piston in the de
sired direction for spreading apart the toggle arms as in
FIGURE 3 or drawing these arms toward each other as in
FEG‘URE 1.
The forward end of each of the forward toggle arms 15
toggle for controlling the vertical position of the bucket. 40 is pivoted at 21 to the apex portion of a respective bell
A still further object is to actuate by ?uid power and
crank 22. As indicated on FIGURE 7, the bell cranks
through toggle means the bucket during the crowding ac
22 are laterally spaced and each comprises a pair of
tion and to control the pitch or tilt of the bucket by fluid
spaced parts 22a and 22b which are connected by an
pressure means.
integral web 22c.
A still further object is to produce a simple and efdcient 45
The short horizontal arm of each bell crank assembly
front end loader having the novel features of construc
22 is pivotally secured by a pin 23 to the rear face of a
tion and operation hereinafter described.
bucket 24. The long vertically disposed arm of each
Other ‘objects and advantages of the invention will here
bell crank 22 is pivotally secured at 25 to an arm 26
which is generally parallel to the respective toggle arm
inafter appear and for purposes of illustration but not of
limitation, an embodiment of the invention is shown on 50 15. The rear end of each arm 26 is pivotally connected
the accompanying drawings in which:
at 28 to a generally triangular rock bracket 27. The
lower or apex portion of the bracket 27 is pivoted to the
FIGURE 1 is a side elevation of a front end loader
shaft is. Pivotally connected at 29 to the rearwardly
machine showing the bucket at ground level and in retract
ed position;
disposed upper end of each bracket 27 is the front end
of a rod 3i? which is generally parallel to the arm 14 and
FIGURE 2 is a side ‘elevation of the machine shown in
has its rear end pivoted at 31 to a rock bracket 32. The
FIGURE 1 with the bucket in its advanced position;
lower end of the rock bracket 32 is pivoted at 33 to a
FIGURE 3 is a view somewhat similar to that of FIG
bracket 34 ?xed to the cab 19. As shown in FIGURE 5,
URES 1 and 2 but showing the cab and crawler structures
the two rods 30 are integrally connected by cross braces
by broken lines, and showing the bucket in elevated po—
sition;
60 3th: and converge for a portion of their length so that
the rear ends are disposed between and spaced from the
FEGURE 4 is a fragmentary elevation of the bucket
toggle arms 14. it will thus be apparent that the arm
and adg'acent parts showinc the bucket in its downwardly
assembly 39 is an integral fabricated unit.
tilted or discharge position;
The bucket 24- has a front open mouth and is formed
FIGURE 5 is a top plan view of the mechanism shown
in FIGURE 3, the cables being omitted for purposes of 65 with a bottom wall 35 and vertically disposed side wings
36. integral with a portion of the upper ends of the
clarity;
side wings 36 is an upwardly and rearwardly inclined
FIGURE 6 is an enlarged side elevation of the bucket
back wall 37 and closing a portion of the top of the
assembly; and
bucket is an upwardly and forwardly inclined short top
FIGURE 7 is a rear end elevation of the bucket as
wall 38. Suitably secured as by welding on opposite ends
sembly shown in FEGURE 6 and taken substantially on 70 of the rear wall 37 are pairs of converging wing-like
the line 7—7 of FIGURE 6.
brackets 3d and straddling the upper ends of these pairs
3,080,078
4
3
ing or raising of the assembly and as well as creating a
downward pressure and assisting in the crowd action
of the bucket itself.
of brackets are the parts 22b and 22c of the bell cranks
22, a pin 23 serving as the pivotal connection between
the respective bell cranks and the brackets.
The inner portion 22b of each of the bell cranks 22
‘is welded to the vertical arm portions of an inverted 01
U-shaped supporting structure 40 which is formed with a
horizontally disposed cross vmember 41. A tubular brace
member 42 is rigid with the legs of the U structure 49
for strengthening the same.
After the bucket 24 has been ?lled, the entire assembly
may be elevated by operation of the hoist drum 55, taking
up on the cable 53 and rocking the toggle arms 14 and 15
about their pivots on the brackets 13. To retain the con
tents within the bucket 24, liquid under pressure may be
introduced to the cylinders 43 through the'connections
Hydraulic mechanism is provided for effecting tilting 10 45 to extend the piston rods 47 for moving the bucket
of the bucket 24 to and from discharging position and,
as shown, a pair of double acting hydraulic cylinders 43
substantially to the position shown in FIGURE 3, in
which tilted position the contents will remain within the
bucket.
are arranged between the legs of the inverted U struc
The cab 10 may then be swung to a suitable position
ture 40. The upper ends vof these cylinders are pivotally
'secured to brackets 44 which are rigid with the under 15 Where it is desired to ‘dump the bucket 24. If desired, the
machine may be advanced on the crawlers 12 if the load
side of the horizontal cross member 41. Adjacent oppo
is to be dumped or discharged at a more remote place.
site end portions of each of the cylinders 43 are hose
When the bucket has been moved to the desired place
connections 45 at the top 46 and adjacent the bottom,
where the contents are to be discharged, the operator
the hoses secured thereto lead to the cab 10 where they
are suitably connected to a pump and suitable controls 20 within the cab 1% introduces liquid under pressure to
the cylinders 43 and particularly through the ‘hoses 46
so thatliquid under pressure may be admitted to one
for retracting the piston rods 47, thereby to tilt the
end or the other of the cylinders for effecting the de
sired movement of'the pistons disposed therein. Con
nected to these pistons are'piston rods 47, the lower
ends of which are pivotally connected to brackets 48
bucket 24 downwardly substantially to the position shown
in FIGURE 4 for discharging the load. After the load
has been discharged, the bucket'through the above de
scribed hydraulic connections will be rocked to a position
approaching that of FIGURE 1 so that the boom made
which are rigid with and project outwardly from the
'back'wall 37 of the bucket. As particularly shown in
FIGURE 6, the brackets 48 project outwardly a consid
up of the various parts above ‘described, including. the
erable distance beyond the brackets 39 to which the bell
toggle arms lA-and 15, can be lowered to the position of
crank structures 22 are pivoted.
30 FiGURE 1 by retraction of the piston rods 19 due to
Welded to or otherwise ‘securely ?xed to the outer
end portions of the toggle arms 15 are rods 49 respec
tively which, as shown in FIGURE 5, converge at their
inner ends which are pivotally connected to a cross shaft
introduction of liquid under pressure to the hose connec
tions 18b. This brings the parts to the positionshown in
FIGURE 1 preparatory for another bucket loading op
eration. It will be understood that in carrying out the r
5G. Depending from the shaft 54) and disposed on oppo 35 loading, the cable 53 is payed out at the same time the
"sit'e 'si'de's 'of‘the end portions of the arms 49 are hanger
toggle arms 14 and 15 are extended.
arms 51, the lower ends of which are pivotally mounted
By maintaining the parallelogram arrangement made
on the ‘cross shaft 16. Disposed between the inner ends
up of the arms 14, '15 and 30 and 26, it Will be manifest
'of the rods 49'is a pulley 52 about which is passed a
that when the parts are lifted, a substantially. parallelo
‘cable 53 which also passes about a sheave assembly 54, 40 gram boom is formed, the lifting taking place through the
with one end of'the ‘cable anchored at 53a to the pulley
agency of the hoist cable 53 in the region of the joint
52 and the other end wound about a power driven hoist
‘between the toggle arms '14 and 15, the arms 30 and 26
drum 55 Within the cab 10.
_
maintaining their parallel spaced relation due to the man
The sheave assembly 54 is supported by a jack frame
ner in which they are mounted at their opposite ends. An
56' which " is vertically disposed and has its lower end
45 important feature of the invention resides in disposing the
pivoted to the rock bracket 32 at 57. Also passing
bucket at a predetermined position or pitch, unless the
around a portion of the sheave .assembly 54 is a cable
operator desires to raise or lower the lip of the bucket,
58 which is suitably passed over a sheave arrangement
this enabling the operator to make a perfectly smooth
59 within the cab and extends to a power driven boom
hoist '(not shown).
In operation and, assuming the parts are in the posi
tion shown in FIGURE 1 and it is desired to advance
the scoop bucket 24 to grade a'surface, etc., liquid under
pressure is delivered to the cylinders '18 through the con
nection 18a for advancing the piston rods 19 thereby to
‘straighten out the toggle arms 14 and 15. The action
of the piston and cylinder assemblies 13 and 19 is such
that the toggle arms 14 are forced downwardly due to
grade at practically any angle he desires. This is achieved
50 by the double parallelogram arrangement of arms above
described.
Although this is not shown, it will be understood that
a conventional automatic pressure release may be pro
vided to relieve the pressure in the bucket operating cyl
inders, should the bucket encounter an immovable ob
ject which would otherwise damage the components of
the hydraulic system.
The boom ‘hoist acting through the cable 58 and as
the connection between the cylinders 18 and the depend
sociated sheaves is employed only to control the position
ing brackets 17. At the same time the forward toggle
of the jack frame 56. In the normal operation of the
arms 15 are forced outwardly by the action of the pis 60 machine, the jack frame is maintained in the position sub
‘ton rods 19. This effects forward or crowding move
ment to the bucket 24 but in order to maintain the lat
ter at ground level, the cable 53 is payed out in order
to enable the sheave 52 and adjacent parts, including the
arms 49, to move downwardly.
At the same time the
arms 30 and 26 which are disposed parallel to the tog
:gle arms 15 and 14 respectively similarly move down
wardly. Thus as the piston rods 19 are extended, the
toggle formed by the arms 14 and 15 is moved closer
into horizontally aligned position. During such crowd
ing movement of the bucket, it may be necessary to alter
‘the disposition of the bucket relative to ground level
by introducing liquid under pressure to the cylinders 43
for effecting the desired bucket movement. The cable
mechanismlembodyingthe cable 53 controls the lower
stantially as indicated on ‘the drawings.
Numerous changes in details of construction, arrange
ment and operation may be effected without departing
from the spirit of the invention, especially as de?ned in
the appended claims.
What I claim is:
V
l. A loading machine comprising ‘an ambulatory and
revoluble supporting platform, a bracket on said'platform,
an inner toggle arm having one end pivoted to said
bracket, a forward toggle arm having one end thereof
pivoted to the other end of said ?rst toggle arm forming
a toggle joint, a bell crank having its apex pivoted to the
other end of said forward "toggle arm, a scoop bucket,
a pivotal connection between one ‘arm of said bell crank
5
and the rear end portion of said bucket, an arm pivoted
to the other arm of said bell crank and disposed generally
parallel to said forward toggle arm, a rock bracket
mounted on the pivotal connection between said inner
and forward toggle arms and upstanding therefrom, a C11
pivotal connection between the adjacent end of said paral
lel arm and said rock bracket, an arm parallel to said
inner toggle arm and pivoted to said rock bracket at
one end, an upstanding rock bracket on said platform to
6
bell crank and the rear end portion of said bucket, an
arm pivoted to the other arm of said bell crank and dis
posed generally parallel to the forward toggle arm, a
rock bracket mounted on the pivotal connection between
the toggle arms and upstanding therefrom, a pivotal con
nection between the adjacent end of said parallel arm and
said rock bracket, an arm parallel to said inner toggle
arm and pivoted to said rock bracket at one end, an up
standing rock bracket on said platform to the upper por
the upper portion of which said last parallel arm is 10 tion of which said last parallel arm is pivoted, a double
pivoted, a double acting linear motor for extending and
acting linear motor for extending and retracting the tog
retracting the toggle arms, a bracket depending generally
gle arms, a bracket depending from the inner toggle arm
downwardly from the inner toggle arm adjacent the inner
adjacent the inner end thereof to which one end of the
linear motor is pivoted, a pivotal connection between the
end thereof to which one end of said linear motor is
pivoted, a pivotal connection between the other end of
other end of the linear motor and an intermediate portion
of the forward toggle arm, hoist means extending from
said linear motor and an intermediate portion of the
said platform to the pivotal connection between the toggle
forward toggle arm, and hoist means including a pulley,
a ?rst rigid arm having one end pivot-ally connected to
arms, said hoist means including pulley means, rigid arm
means extending downwardly from the pulley means to
the toggle joint between said inner and forward toggle
the toggle joint, a rigid arm extending from the pulley
arms and its other end pivotally connected to said pulley,
means to the front end of the forward toggle arm, a hoist
a second rigid arm having one end pivotally connected to
drum on the supporting platform, and cable means reeved
said pulley and having its other end pivotally connected
from the pulley means to the hoist drum, an upright jack
to said bell crank, a hoist drum mounted adjacent said
frame pivoted to said upstanding rock bracket, a sheave as
platform, and cable means extending from said drum
sembly on said jack frame, and means for controlling the
and reeved about said pulley.
position of the jack frame and including a cable passing
2. A loading machine comprising an ambulatory and
revoluble supporting platform, a bracket on said plat
about said last sheave assembly.
4. A loading machine comprising a supporting plat
form, an inner toggle arm having one end pivoted to said
form; toggle mecham'sm having pivotally connected inner
bracket, a forward toggle arm pivoted to the other end of
said ?rst toggle arm forming a toggle joint, a bell crank 30 and forward toggle arms; a pivotal connection between
the inner end of said inner arm and said platform to af
having its apex pivoted to said forward toggle arm, a
scoop bucket, a pivotal connection between one arm of
ford vertical swinging movement of said arms; a scoop
said bell crank and the rear end portion of said bucket,
bucket; means providing an operative connection between
said forward toggle arm and said bucket; a double acting
linear motor for actuating said toggle arms; a mounting
for opposite ends of said linear motor, said mounting
including a bracket extending generally downwardly from
the inner end of said inner arm and adjacent to said piv
m arm pivoted to the other arm of said bell crank and
disposed generally parallel to the forward toggle arm, a
rock bracket mounted on the pivotal connection between
the toggle arms and upstanding therefrom, a pivotal con
nection between the adjacent end of said parallel arm
and said rock bracket, an arm parallel to said inner toggle
arm and pivoted to said rock bracket at one end, an up
standing rock racket on said platform to the upper por~
tion of which said last parallel arm is pivoted, a double
acting linear motor for extending and retracting the tog—
gle arms, a bracket depending from the inner toggle arm
adjacent the inner end thereof to which one end of the
linear motor is pivoted, a pivotal connection between the
other end of the linear motor and an intermediate portion
of the forward toggle arm, and hoist means extending
otal connection between the inner end of said inner arm
and said platform, a pivotal connection between one end
of said linear motor and said bracket, and a pivotal
connection between the opposite end of said linear motor
and said forward toggle arm, whereby upon actuation of
said linear motor in one direction concomitant rocking of
said inner arm and extension of said forward arm of said
toggle mechanism toward a position where said toggle
arms align is effected and the opposite action is effected
upon actuation of said linear motor in the opposite direc
from said platform to the pivotal connection between the
tion; and hoist means from said platform to the joint
of said toggle arms for controlling the raising and lower
toggle arms, said hoist means including pulley means,
rigid arm means extending downwardly from the pulley 50 ing of said toggle arms and thereby said bucket.
means to the toggle joint, a rigid arm extending from the
References Cited in the ?le of this patent
pulley means to the front end of the forward toggle
UNITED STATES PATENTS
arm, a hoist drum on the supporting platform, and cable
means reeved from the pulley means to the hoist drum.
3. A loading machine comprising an ambulatory and 55
revoluble supporting platform, a bracket on said platform,
an inner toggle arm having one end pivoted to said brack
et, a forward toggle arm pivoted to the other end of said
?rst toggle arm forming a toggle joint, a bell crank hav
1,561,694
1,693,809
Clutter ______________ __ Nov. 17, 1925
Clutter ______________ __ Dec. 4, 1928
2,801,012
2,835,397
2,965,253
Lederer ____________ __ July 20, 1957
Wagner ____________ __ May 20, 1958
Poulter et al. _________ _._ Dec. 20, 1960
FOREIGN PATENTS
ing its apex pivoted to said forward toggle arm, a scoop
bucket, a pivotal connection between one arm of said
129,142
Sweden ____________ __ Aug. 15, 1950
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